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I have a sensative stomach and during Ironmans and Ultra-Runs have a terrible time ingesting calories. GU has always been my go-to energy source when all else is failing. It's my energy source of choice for everything longer than a 2 hour race.

Tried the Orange burst for the first time on a 1/2 Marathon. I was truely amazed. I never lost my edge. I took it at the begining and at mile 8. Just was impressed with it for the little investment, how big of a difference it made for me. I will be using it more often for my longer races.

Great to use during marathon training and on race day! The best part is the chocolate GU flavor tastes like chocolate cupcake icing! They definitely help give that extra boost in energy, especially during those last few miles.

Recently started using GU on my long runs training for 1st marathon, and the difference is definitely noticeable. As a 25-year, early morning runner, my favorites runs are before breakfast with little to nothing on my stomach. That works fine for runs of less than an hour, but I struggled when I got an hour into long runs. Now, I down one GU with water 15 minutes before I run and one every 45 minutes during my run, and I've had no problems keeping my energy up all the way through my workouts.

I've tried other energy gel brands and flavors, but I always end up purchasing the GU Vanilla Bean Energy Gel 24 pack. They taste great and they work to keep me energized on my long runs, bike rides, and races.

I use for running anytime I run more than an hour. Longer runs I use Ultra. Usually helps me after about 10 minutes and can feel the energy for about 15-30 minutes. I need to drink plenty of water when I take it. Salted Carmel - great taste. I'm age 65, still works for me.

This was my first time trying the Caramel/Sea Salt flavor. It is delicious! I followed the directions to take it 5 minutes before my run and every 45 minutes thereafter! It gave me the energy I needed to sustain my long training runs! Plus the salt helps! I highly recommend it! I will also try different flavors.

Watch the GU Energy Gel Video!

GU Energy Gel Video Description:

GU Energy Gel gives you the optimal balance of maltodextrin and fructose delivers a quick blood sugar rise, and then maintains that glucose level for up to 45 minutes. GU keeps your mind alert and active, and your muscles going strong during your regular workouts.

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dave rated this product
5 starsSun, November 15,2009:
tried hammer and jelly beans received no bennies what ever. love chocolate and bought the gu. can really tell the difference on long runs and bike rides. if you like chocolate this is for you.

2.

Mari rated this product
5 starsThu, October 29,2009:
I'm in love with the strawberry banana, and take it on my long runs. Recently, I brought a packet of chocolate to test it out since lotsa people were raving about it. I really didn't care for it. It was harder to swallow for some reason (could be just me) and tasted overly sweet. But, I'm not a chocoholic, so that could explain it. I'm sticking with my strawberry banana :)

3.

average joe whose name is joe rated this product
5 starsFri, October 23,2009:
I am a boat captain. sometimes we get into a storm and im real hungry but i have to stay at the control center. thats why i keep some GU with me at all times. its fulfilling and reminds me of how seaweed mixed with coral tastes, yum. - Joe

4.

Brent rated this product
5 starsTue, September 15,2009:
Tried the Orange burst for the first time on a 1/2 Marathon. I was truely amazed. I never lost my edge. I took it at the begining and at mile 8. Just was impressed with it for the little investment, how big of a difference it made for me. I will be using it more often for my longer races.

5.

Shelly rated this product
5 starsWed, September 09,2009:
Love the GU! I tried PowerBar Gel because the half marathon I'm planning on running is having those on course. It was awful! The taste was very artifical and chemical-like. I have been using GU on my long runs of over an hour and I like the taste and thicker consistency. I have not had issues with stomach upset or other gastrointestinal problems. I like every flavor in the variety pack. None are too strong, which I was concerned about, especially with the fruit flavors. I would highly recommend you at least try GU, although I will admit that these gel products are mostly about personal preferences (taste, consistency, effect, etc).

6.

Kristi rated this product
3 starsMon, August 31,2009:
I recently decided to give these a try on my long runs (90 mins+). I used the Strawberry Banana and the flavor isn't bad at all...consistency is excellent. Especially compared to the PowerBar brand (which I do not like at all). The first time I followed the recommedation, I took one 15 mins prior, then at 45 mins--got a slight stomach cramp, and 90 mins--total nausea and had to throw up road-side. I also felt as tho I needed a LOT more water than normal after taking them, almost as if they were dehydrating me faster. The next week, I skipped the pre-run shot and did one at 60 minutes--no problem other than thirst, then another one at 2 hrs--again felt like I needed an excessive amount of water to get it down and slight stomach cramp returned, but no puking this time. I can say that there is always an energy boost within 5 minutes of taking a shot, so they do work. But if you have a sensitive stomach, it might not be for you. I'm going to try the HammerGel next on a friend's advice.

7.

Chris rated this product
5 starsSun, August 02,2009:
Recently started using GU on my long runs training for 1st marathon, and the difference is definitely noticeable. As a 25-year, early morning runner, my favorites runs are before breakfast with little to nothing on my stomach. That works fine for runs of less than an hour, but I struggled when I got an hour into long runs. Now, I down one GU with water 15 minutes before I run and one every 45 minutes during my run, and I've had no problems keeping my energy up all the way through my workouts.

8.

Shannon rated this product
4 starsThu, July 30,2009:
I don't really notice much if an energy boost, but the vanilla bean flavor is good. The consistency is smooth and easy to swallow, and I've never had any stomach issues with it.

9.

Bill rated this product
5 starsMon, July 06,2009:
Works great! I tried this after working all day and then needing the energy for even a short run and it picked me up immediately. Bought the mixed box but the Chocolate Outrage is our favorite!

10.

Jason rated this product
5 starsSun, June 28,2009:
I ordered the chocolate outrage based on a couple reviews below that it tasted like cupcake icing. I wasn't expecting much, but it's true. I think people would eat it as a snack if they could. I tried the Powergel and that's just crap compared to this. Not only is the taste better, but the consistency is much better too. You may need some water to wash it down, but at least you won't have to worry about it spilling all over the place when you rip the top open.

11.

Anonymous rated this product
5 starsWed, May 27,2009:
i started using the strawberry bananna gu and found it works great when i take some 1 hour before a long run and then another 30 minutes before my run, it makes me feel so energized

12.

sc runner rated this product
5 starsWed, March 18,2009:
If you're looking for a gel . . . this is it! I've tried all of them! The chocolate outrage tastes like icing on a cake! If you're into gels, GU leads the pack. If you're into chews, try Luna Moons. They're hard to find sometimes, but all easier to eat (smaller than Shot Blocks) and offer an alternative to always using gels.

13.

Skeeter rated this product
5 starsMon, March 02,2009:
I am training for my first marathon and started using this during my long runs. The Chocolate Gu is unbelievably great! I have no problems digesting it and really picks me up during my runs!

14.

Brian Moore rated this product
5 starsFri, January 02,2009:
I have tried many other products but this has the best taste and it works. I use it on all my runs. There easy to swallow and are not a hassle.

15.

L. BLAIN rated this product
5 starsTue, May 06,2008:
OUTSTANDING PRODUCT!!! I have increased run times and performance for all my runs over four miles and increased recovery time after runs. This stuff is easy to swallow while on the run with a little water. I like all the flavors offered. You can realy feel the difference!!!

16.

Jill rated this product
5 starsWed, April 09,2008:
Gu is the best. I have tried everything and even have trouble drinking gatorade. I can only use the flavors without caffeine (sensitive stomach) so I like lime sublime, but wish there were more choices without caffeine - like vanilla. Love this product! I use it on all my runs that are 6+ miles.

17.

Julie rated this product
5 starsThu, February 28,2008:
I love GU - beats the ClifShots and Clif Shot Blocks for me hands-down. The 24 pack is awesome - nice mix of flavors, 6 out of 8 of which are caffeinated. Also, a significant savings (approx. 32 cents cheaper per GU with my VIP discount) from buying them at my local running store!

18.

Autaum rated this product
5 starsWed, November 14,2007:
You can't run without this gel. After about 40 mins this is what I use for more energy and it works wonders. Great flavors...vanilla bean my favorite...and great on the stomach.

19.

Sean rated this product
5 starsMon, September 17,2007:
Orange and Strawberry banana are my favorites. They are really easy on the stomach for the pre-race, however I think they are tough to swollow during the race.

20.

Janis rated this product
4 starsWed, September 05,2007:
The chocolate, vanilla, and espresso flavors are the best (if you like coffee). The fruity flavors are not as good in my opinion, but they all keep your energy up during a long run. They seem to be easy on the stomach both during and after the run.

21.

Lisa rated this product
5 starsMon, August 20,2007:
I agree with Buck. The chocolate was delicious. I think it would make a healthy and tasty frosting on a cupcake!

22.

Buck rated this product
5 starsWed, July 18,2007:
Not thrilled with the fruity flavors, but the chocolate outrage is cash money! Tastes like chocolate brownie batter--what a lovely treat during long runs!

23.

Kevin rated this product
4 starsTue, February 20,2007:
I preferred their Banana flavored GU, but apparently they've discontinued it. I like TriBerry and on my next long run I'll try the Strawberry-Banana.
I used to eat Powerbars on long runs, but I live in a cold climate. The Powerbars ended up frozen solid, and eating one was like trying to eat a 2x4. The gels give me the same kick, and they don't freeze solid. I've used them as cold as 10 degrees above zero and had no problem with them freezing.

24.

Jesse rated this product
3 starsWed, November 15,2006:
Just tried the expresso love, its the worst tasting stuff ever, but the energy is really kicking in. I had this stuff before a track meet, and improved my 400m time greatly

25.

Daren rated this product
4 starsFri, October 13,2006:
Love the Gu. The size makes it easy for me to store 4+ in my pocket in the waist of my shorts which helped when you don't want to carry extra baggage on real long runs. Some flavors just aren't that great, but I think of it more as a wake me up when I use those. Can't go wrong with Chocolate and Vanilla.

26.

Ben rated this product
5 starsThu, October 05,2006:
I have been really impressed with the GU energy gells. My favorite is the Vanilla Bean. Helps me on those longer runs as well as those early morning workouts when I can't eat anything else.

27.

Beantown rated this product
2 starsWed, June 21,2006:
The GU gel is OK. You can judge these gels on fact that you don't vomit. They all taste like medicine and have a horrible consistency, like drinking honey. Personally I only use on runs over 1 hr, otherwise I prefer an apple or banana with a flinstones chewable post-run. If you have to suck on of these down, I'd stay away from the chocolate, coffee ones. Also Hammer Gels are a good product if you can find them.

28.

Kelley rated this product
1 starThu, June 08,2006:
Gu Gel is way too sugary for me - they work for so many people but not me. Clif Shots are better in my opinion.

29.

Greg rated this product
4 starsThu, May 25,2006:
I'm mildly hypoglycemic so it's essential to get a shot of carbs at regular 45 minute intervals during a marathon... or else I crash hard. I've tried half a dozen gels and Gu is the best for me. Some gels give me a quick burst of energy and then let me down quick. Some mess up my stomach. Gu gives sustained energy and doesn't cause any stomach discomfort so long as I get some water with it. It's also rather cheap compared to other brands. It lacks electrolytes so I find myself supplementing with Nuun or electrolyte powder as well.

Carol rated this product
5 starsTue, September 27,2005:
I love the Espresso Love before any workout. I'm not a big eater before I run and I don't indulge in any other caffeine so the boost really makes a difference.

32.

Terry rated this product
5 starsWed, July 27,2005:
Rate this 5 stars. Fantastic stuff. I have one before my run and one after. My runs have all been great since I started using GU.

33.

Kate rated this product
5 starsSat, March 26,2005:
For my money, GU is the best gel on the market. Unlike many others, GU includes vitamins C and E, which speed recovery. I've yet to hit the wall--even in a 40 miler--with GU, and it's palatable enough to consume throughout a race.

34.

running mom rated this product
5 starsMon, September 20,2004:
"Just Plain" Gu is my favorite long run fuel. I eat one every 45-60 minutes, and it definitely keeps me going.

35.

Kim rated this product
4 starsSat, August 28,2004:
a noticable energy boost during a long run. the fruit flavors are hard to swallow and too syrupy sweet. just plain, chocolate, and vanilla are not too bad. be sure and drink some water with them.

36.

Gary rated this product
5 starsWed, April 14,2004:
Easy to swallow with water and no stomach cramps. Will get you through the long runs and 1 packet should be used after a long run to speed recovery.

37.

Vicki rated this product
5 starsTue, March 09,2004:
I LOVE this stuff! Lovely flavors, easy on the digestive system. It really works.